父子两人沿周长为a的圆周骑自行车匀速行驶.同向行驶时父亲不时超过儿子,而反向行驶

题型:选择题

问题:

父子两人沿周长为a的圆周骑自行车匀速行驶.同向行驶时父亲不时超过儿子,而反向行驶时相遇的频率增大为11倍.已知儿子的速度为v,则父亲的速度为

A.1.1v

B.1.2v

C.1.3v

D.1.4v

考点:分式方程的定义解分式方程分式方程的应用
题型:选择题

下列各组数中,能够组成三角形的是( )

A.1,2,3

B.2,5,8

C.2a,3a,4a

D.3a,7a,2a

题型:选择题

下列服务组件中, (58) 服务可以使用户在Linux与Windows操作系统之间实现文件系统和打印机共享功能。

A.RPM

B.Squid

C.X-Windows

D.Samba

题型:选择题

用单词的适当形式填空。

1.Jim is _______ of his English. (confidence)

2.We gave _______ some advice. (his)

3.He enjoyed _______ during the holiday. (watch)

4.I enjoy _______ TV very much. (watch)

5.It is difficult _______ those words. (spell)

6.Would you like _______ with me? (go)

7.Tom _______ already _______ his homework. (finish)

8.Mr. Wang _______ us Chinese last year. (teach)

9.I will ask Tom _______ you about that. (tell)

10.Are you _______ at maths? (talent)

11. Some _______ (German) came here yesterday.

12.What is the _______ (spell) of the word?

13.Please use knives _______ (cut) things.

14.Have you _______ (write) anything?

15.The teacher is coming. Let’s stop _______ (talk)?

题型:选择题

下列属于公安业务信息系统的有()

A.刑侦信息系统

B.人口管理信息系统

C.出入境管理信息系统

D.监管人员信息系统

E.禁毒信息系统

题型:选择题

数学问题解决的基本心理模式是“理解问题”、“设计方案”、()和“评价结果”。

A.填补认知空隙

B.执行方案

C.反思修正

D.调查资料

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